UPNP startup problem

Hello guys..
I have installed UPNP packages via Luci....i Enable it via startup page.
It seems that doesn't work at all.
From Putty when i run "/etc/init.d/miniupnpd start"
It gives me this error ..."/etc/rc.common: line 1: arithmetic syntax error"
So i think it doesn't starts at all.
And in "Firewall Status" in section "Chain zone_wan_forward" it has to entries for MINIUPNPD.
Simillar in section "Chain zone_wan_prerouting " it has to entries for MINIUPNPD.
What can i do to solve this?